Territory



(No Model.)

D. 1. CRAIG. ADDNG MACHINE.

110.454,71). Patented June 23,1891.

DM 51. I el??? UNITED STATES PATENT EEICEi DUDLEY IRVINE CRAIG, OFSILVER KIN i, ARIZONA TERRITORY.

ADDING-IVIACl-ilNE.1

SPECIFICATION forming part of Letters Patent No. 454,715, dated June 23,1891.

Application filed October 9, 1890.

To @ZZ whom it may concern;

Beit known that I, DUDLEY IRVINE Cante, a citizen of the United States,residing at Silver King, in the county of Pinal and Territory ofArizona, have invented certain new and useful Improvements in AddingMachines; and I do hereby declare the following to be a full, clear, andexact description ot' the invention, such as will enable others skilledin the art to which it appertains to make and use the same.v

My invention relates to improvements in addingnnachines, and has for itsobject to provide a machine which will automatically and accuratelyaddone or two columns of iigures.

A 'further object of myinvention is to provide an adding-machine whichshall be of suoli compact form as to be carried by a person desiring touse the same without the least inconvenience, and a still further objectof my invention is to provide a machine of such simple construction asto render the same not only durable but also cheap of manufacture.

Vith these and other ends in view my invention consists in thecombination, with a base or support, of a revoluble rim carrying apointer adapted to indicate the numbers on a dial carried by the base orsupport, a hundreds-wheel arranged on a suitable stationary supportwithin the revolublc rim and adapted to be operated by a stud or lugcarried by said rim, a pointer connected to the hundreds-wheel andadapted to indicate on a suitable dial the number of completerevolutions of the revoluble rim, an operating-arm adapted to connectwith and rotate the revoluble rim, and mechanism for returning theoperating-arm and the indicating-pointers to zero.

My invention further consists in the novel construction and arrangementof parts, as will be hereinafter fully described and claimed.

In order that others may understand my invention, I have illustrated thesame in the accompanyingdrawings, in which-- Figure I is a plan View ofan adding-machine constructed in accordance with my invention. Fig. IIis a sectional view on the line C of Fig. I. Fig. III is a detail planview of the mechanism indicating the liundreds, with 'the dial removed.Fig. IV is a Serial No. 367,552. `(No model.)

detail view oi the operating-arm. Fig. 'V is a detail view showingserrations in both edges of the revoluble rim and the pawl engaging withthe serrations on the lower side thereof.

Like numerals of reference denote corresponding parts in all the figuresof the drawings, referring to whichl designatesa base or support made ofany suitable material and provided on its upper surface with a dial Thedial 2 is divided into one hundred equal parts, which are numbered fromone to one hundred, (l to 100,) inclusive.

Within the base or support l is formed a circular depression or cavity3, and in the center ot this cavity and made integral with or securelyattached to the base l. is a circular pivot-block e. Fitted snuglyWithin the depression or cavity 3 is the revoluble rim or annulus 5,provided on both edges with a series of one hundred serrations or teethG 7, and said rim or annulus is rigidly united to a disk S, which at itscenter is iitted around the pivot-block l. in the center of thedepression or cavity It desired, instead of making the disk 8 solid askeleton frame may be used and the arms oi' said frame may be attachedto the rim 5 and to another smaller ring fit-ted around the pivot-block,as is obvious. To the outer side of the revoluble rim 5 is attached inany suitable manner an indicating hand or pointer 9, which extendsoutwardly over the dial 2 on the upper surface of the base or support l.

l0 designates a support or block, which is suitably secured to the fixedpivot-block 4, and it extends for some distance over the disk S. In thisiixed support or block IO is formed a chamber ll, situated at or nearthe edge of said support, within which chamber is suitably journaled ahorizontal toothed or serrated wheel l2, the teeth on one portion oiwhich extend slightly beyond the edge of the support or block 10 and areadapted to be cngaged one after the other by an upwardlyextending studor projection 13, which is suitably secured to the upper surface of thedisk S, within the 'rim 5, and arranged at a point diametricallyopposite to the indicatingpointer 9.

The upper end olf the shaft or arbor on which the wheel 12 is supportedis provided IOO With a hand or pointer 13, Which turns with said shaftand Wheel, and said hand is adapted to be moved one point forward on ahundredsdial 1i on the upper surface of the support or block 10 everytime the Wheel 12 is moved one notch or every time the revoluble rimmakes a complete revolution.

The Wheel 12 is permitted to move in but one direction, and is preventedfrom backward movement by a spring-pawl 15, suitably secured Within thechamber 11 and engaging with the teeth or serrations on the wheel 12.

In the center of the support or block and the pivot-block i is journaled an upright shaft 16, which has attached to the upper end thehorizontal operating-arm 17. The arm 17 is preferably formed of a flatpiece ot spring metal, and the outer end thereof is bent or formed intoa hand or pointer 17', which normally rests against a post 18, securedin the base 1 at the place ivhere one hundred is marked on the dial 2.The arm 17 is provided near its outer end With an upwardly-extendingprojection or thumb-piece 19, and on its lower Jface said arm has adepending tooth 20, which is adapted, when the outer end of the arm isdepressed, to engage with one of the teeth on the upper edge of therevoluble rim 5. The arm 17 is bent at a point intermediate ol' itslength into the upwardly-extending bend or swell, so that as said arm isrevolved about its pivot it will clear or pass over a thumb-piece 21,carried by the hand or pointer 13 of the hundreds mechanism. Near thepivot of the arm 17 is connected one end ot a coiled spring 22, and theother end of the spring, after passing around the shaft 1G in a suitablebox, is securely attached thereto.

The revoluble rim or annulus 5 is permitted to move in one directiononly, and it is kept from movement in the reverse direction by mea-ns ofa spring-pa'wl 23, which is secured at one end Within the depression orcavity 3, and the free end of which engages With one of the teeth orserrations on the lower edge of said revoluble rim 5.

To illustrate the operation et the machine, I will describe how threenumbers-for example, 15, 20, and 5J-are added. The different parts ofthe machine being in the positions shown in Fig. I of the drawings, theoperating-arm 17 is depressed until the tooth 20 engages With thetoothed revoluble rim 5, When the same is turned in the directionindicated by the arrow fm until the pointer on the arm 17 and thepointer 9 (situated in the same vertical plane) point to the number 15on the dial 2. The pressure on the operating-arm is then removed, andthe tooth 2O becomes disengaged from the rim 5, and the arm 17 isreturned to its original position in line With the Zero-post by means ofthe coiled spring 22, the revoluble rim being held in a fixed stationaryposition. by the pawl 23. The operating-arm is noW depressed for thesecond. time and the revoluble rim is turned thereby until the pointerof said operating arm comes over the number 20 on the dial 2, While thepointer 9 will be advanced and point to the number on said dial.Pressure being removed l'rom the operating-arm, it is returned toitsfirst position by the spring 22, the springpaWl 23 holding the rim 5 inplace. The operating-arm is new depressed for a third time and therevoluble rim rotated until the pointer on said operating-arm extendsover the number on the dial 2, when the pointer 9 Will have beenadvanced so tar around the dial 2 as to point to the number SO, which isthe sum of three numbers-15, 20, and 45. Every time the revoluble rim 5makes a complete revolution, or, in other Words, When the sum of thefigures added reaches one hundred, (100,) the stud er projection 13 ofthe revoluble rim or annulus causes the Wheel 12 to turn one tooth ornotch, and the hand or pointer 13 points to the numeral 1 on the dial14. To place the parts in position for adding another column, the handor pointer 13 is revolved by means of the thumb-piece 21 until said handpoints to Zero on the dial 14, and the revoluble rim 5 is turned aroundthe pivot-block fi until the pointer 9, secured thereto, points to Zeroor one hundred on the dial 2.

Changes in the form and proportion of parts and details of constructionmay be made without departing from the spirit or sacrificing theadvantages of my invention.

Ilaving thus described and explained my invention, What I claim as new,and desire to secure by Letters Patent, ism

1. An adding-machine comprisinga base or support provided with thedepression or cav ity, a revoluble rim fitted within said cavityand-extending above the base or support, a hundreds-Wheel supportedWithin the perimeter of the rim and above the plane thereof and adaptedto be operated thereby, and a freely-movable operatingdarm adapted to engage and turn the revoluble rim, as and for the purpose described.

2. In an adding-machine, the combination of a base or support having thedepression or cavity, the stationary pivot-block in the center ot' saidcavity, the block 10, secured to said pivot-block and extendingpartially over the depression or cavity, the revoluble rim fitted insaid cavity between the block 10 and the base, the hundreds-ivheeljournaled in the block 1Q above the plane ot' the revoluble rim, anoperating-arm for turning the revoluble rim, and a vertical stud carriedby said rim for moving the hundreds-Wheel, as and for the purposedescribed.

In an adding-maehine, the combination of a base or support provided withthe units dial, a serrated revoluble rim fitted within a depression orcavity in the base, a pointer carried by the revoluble rim, a hundreds-Wheel j ournaled on a plane above the revoluble rim, means,substantially as described, for rotatn ing the revoluble rim, and thestud carried by said rim for operatin g the hundreds-Wheel, as and forthe purpose described.

IIO

IIS

i. The combination of a base or support provided with the depression orcavity and the central pivot-block, a serrated revolnbie rim fittedaround said pivot-block and within the cavity, a hand or pointer carriedby said rim and passing over a dial on the base or snpport, a Supportsecured to the central pivotblock, a hundreds-whee1 adapted to be turnedbyastud or projection at every complete revolution of the revoinble rim,a hand for rotatin g the revoluble riin, and means for preventing therotation of the said revolubie rim in abackward direction7 substantiallyas shown and described.

5. In an adding-machine, the combination of a base or support having aunits-dial, a revoiuble rim provided on both edges With a series ofSerrat/ions or teeth and iitted Within In testimony WhereofI aliix mysignature in 3o presence of two Witnesses.

DU'DLEY IRVINE CRAIG.

Witnessee;

Jos. H. HAMILL, G. M. ALLIsoN.

